Sample size requirements for interval estimation of the odds ratio.
Sample sizes are calculated for unmatched case-control (or cohort) studies where the goal is interval estimation of the odds ratio. The procedure used gives the smallest sample size for which a 100(1-alpha)% confidence interval for the log odds ratio will not exceed a specified width with specified probability (1-gamma). Tables of sample sizes for various choices of parameter values are presented. Considerable disagreement is found with a published method which has as its basis expected cell counts.
Satten
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Department of Biostatistics, School of Public Health, University of North Carolina, Chapel Hill 27599-7400.
Kupper
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D016022:Case-Control Studies; D015331:Cohort Studies; D016001:Confidence Intervals; D016017:Odds Ratio; D011336:Probability; D013223:Statistics as Topic